1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/sort_byteoffset.js b/js/src/tests/non262/TypedArray/sort_byteoffset.js
new file mode 100644
index 0000000000..b4e262c450
--- /dev/null
+++ b/js/src/tests/non262/TypedArray/sort_byteoffset.js
@@ -0,0 +1,30 @@
+// Ensure that when sorting TypedArrays we don't
+// ignore byte offsets (bug 1290579).
+
+var sortFunctions = [Int32Array.prototype.sort];
+
+// Also test with cross-compartment wrapped typed arrays.
+if (typeof newGlobal === "function") {
+    var otherGlobal = newGlobal();
+    sortFunctions.push(newGlobal().Int32Array.prototype.sort);
+}
+
+// The bug manifests itself only with Float arrays,
+// but checking everything here just for sanity.
+
+for (var ctor of anyTypedArrayConstructors) {
+    var ab = new ArrayBuffer(1025 * ctor.BYTES_PER_ELEMENT);
+    var ta = new ctor(ab, ctor.BYTES_PER_ELEMENT, 1024);
+
+    // |testArray[0]| shouldn't be modified when sort() is called below.
+    var testArray = new ctor(ab, 0, 1);
+    testArray[0] = 1;
+
+    for (var sortFn of sortFunctions) {
+        sortFn.call(ta);
+        assertEq(testArray[0], 1);
+    }
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);